Motor-actuated hand-tool.



W. C. WHITOOMB.

MOTOR AOTUVATED HAND TOOL.

APrLIoA'rIoN FILED Nov. 1a, 1906.

Patented J an. 5, 1909.

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lulllll f 4 l l l l l mm-M W. C. WHITCOMB. v MoTnR ACTUATED HAND TooL.

APPLICATION FILED NOV. 13, 1906.

908,921 Patented Jail. 5, 1909.

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UNITED STATES PATENT oEEIoE.V

WILLIAM C. WHITCOMB, OF CHICAGO, ILLINOIS, ASSIGNOR TO D; WHITCOMBCOMPANY, OF ROCHELLE, ILLINOIS,y A CORPORATION OF ILLINOIS.

Moron-ACTUATED HANmTooL.

Speceation of Letter! Patent.

Patented Jan. 5, 1909.

Application led November 13, 1906. Serial No. 348,246.

To all 'whom 'it may concern: l'

Be it known that I, WILLIAM C. WHIT of the grip for controlling thesupply of ower fluid delivered to the motor of t e too The ob'ect of theinvention is to improve and simpllif the construction of tools of thiskind, and t e invention consists in a structure which is exemplified bythe devices to be hereinafter described and illustrated in theaccompanying drawings, in which- Fi ure 1 is a central longitudinalsectiony nd tool constructed according to the g of a invention; Figs. 2and 3 are sectional views taken on the lines 2-2 and 3-3, respectively,of Fi 1; Fig. 4 is a detail side elevation of a too illustrating amodified form of the invention; Fig. 5 is a sectional view of the same,the plane of the section being indicated by the line 5-5 of Fig. 4; andFigs. 6 and 7 are detail sectional views taken on the lines 6-6 and 7-7,respectively, of Fig. 5.

The tools illustrated in the drawings are of that form employed inmining o erations for drilling and cutting rock or ot er hard Each comrlses a cylindrical body 10, which forms the sliell of a motor having areciprocable piston 14, and has at its forward end a socket 11 for'receiving the head 12 of a drilling cutter 13. The piston 14 ordinarilytakes the form of a plunger for striking the head of the cutter, and isreciprocated within the chamber of the motor by a power fluid in themanner well known in devices of this kind.

In order that the tool may be firmly grasped by the hand of the user, itis preferabl rovided with av grip stock. That of the too i ustrated inFigs. 1 to 3 inclusive of the drawings is of yoke orm and com rises twoarms 15, 16, which spring from t e wall of the cylindrical body 10adjacent its u per end, and a cross-member or spindle 17 w lch isrotatably mounted in the arms 15, 16, of the yoke and carries a grippiece 18.

A duct 19 for a ower fluid leads from a mpple 20, provide for attachmentto the source of power sup ly and referably formed on the body of thetool at t e base of one of the arms, as 15, of the grip stock, throughthe wall of the tool to the chamber of the motor. As shown this duct isprovided with a forwardly-directed valve seat 21, and coperating withthis seat to control the duct is a valve 22, normally closed by a spring23. A valve-stem 24 extends u ward y from the face of the valve 22, acros the duct 19 and through the arm 1,5 of tlie handle of the tool intooperative en agement with the spindle 17 to open the va ve.

Preferabl a cam 25 is formed on one end of the spin e 17 to engage thevalve stem. As is most clearly shown in Fig. 2 of the drawings, this camis housed within the outer end of the arm 15 and is provided with arecess 26 for receiving theid of the valvek threaded .enga ement withthe stem behind the valve. Le age from the duct 19 through the arm 15 ofthe handle of the tool is revented by means of` a shoulder 29 forme onthe valve stem 24. This shoulder is faced with a uantit of packingmaterial 30, ,and this pac 'ng is eld to its seat against .the face ofthe shoulder-29 by a sleeve 31 inclosing thevalve stem and reactingagainst the face of the valve 22.

If desired a gear connection between the stem of the motor valve and:the 'grip member of the handle of the tool may be provided,

- as is illustrated in Figs. 4 to 7 incluslve of the drawings.- In thisform of construction the cylindrical body 10 of the tool is preferablyprovided with a handle or grip-stock in yoke orm and comprising arms 32,33, which spring from the wall of the body adjacent its up r end.

duct 34 for a power iiuid leads from a nipple 35 formed on the wall ofthe body of the tool, referably adjacent the base of the arm 32 of) thehandle, to the chamber of the motor. As shown, this duct is controlledby a valvewhich takes the form of a plunger 36 movable across the duct,and has a stem 37 which extends u wardly through the arm 32 of thehandle o the tool. An oscillatable gri piece 38 is provided for graspingthe tool and), as in the form of constructionpreviously described, thisis preferably carried by a spindle 39 rotatably mounted in the arms 32,33, of the stock. In this instance operative connection between the grippiece 38 and the valve stemv37 is established by means of a gear 40formed on one end of the s indie 39 and housed Within the outervend othe arm 32 ofthe stock, and a gear rack 41 formed on the valve stem.

As is most clearly shown in Fig. 4 of the drawings, the arm 32 of thehandle is inclined to the axis of the tool in order that the gear rack41 may be sufiiciently removed from the center line of the grip 38 toengage the periphery of the gear 40. For convenience in the manufactureand assembling ofthe parts, the gear rack 41 takes the form of ascrewthread turned on the valve stem for a portion of its length.

In use the tool will be held in the hands of an attendant who will graspthe wall of the body 10 with one hand and the grip-piece 18 or 38 withthe other, and will apply pressure to the tool to hold the cutter 13 toits work. By a slight rotation of the gri piece 18 or 38 he may easilycontrol the de ivery of power lfluid to the motor of the tool withoutreleasv yoke, and a hand gri journaled in the two arms of the yoke anthe valve stem.

2. In a fluid-actuated hand tool, in combination, a power cylinderhaving a stock, an attaching niplple formed on the Wall of the cylinderat t e base of the stock and a iluid duct leading from the attachingnipple to the chamber of the cylinder, a sprmgclosed operativelyengaging nation, a power valve for controlling the duct and having astem housed within the stock, and a handle for the tool oscillatablymounted in the stock and operatively engaging the valve stem to open thevalve.

3. In a fluid-actuated hand tool, in combicylinder having a stock, anattaching niplple ormed on the wall of the cylinder at t e base of thestock and a fluid duct leading from the attaching nipple to the chamberof the cylinder, a spring-closed valve for con-trolling the duct andhaving a stem housed within the stock, and a handle for the toolrotatably mounted in the stock and having a cam for engaging the valvestem to open the valve.

4. In a fluid-actuated hand tool, in combination, a power cylinderhaving a stock and a fluid duct entering through the wall of thecylinder at the base of the stock, a springclosed valve for controllingthe duct and having 4a stem housed within the stock, a handle for thetool rotatably mounted in the stock, and a cam carried by the handle forengaging the end of the valve stem to open the valve and having a recessfor receiving the end of the valve stem when the valve is in the openposition.

5. In combination, a fluid duct having a valve seat and an aperture inits Wallin front of the seat, a valve stem extending through theaperture, a packing shoulder and a valve mounted on the stem forrelative adjustment, a packing carried by the stem and coperating withthe shoulder to close the aperture in the wall of the duct, and a sleeveinclosing l the valve stem and reacting between the valve and the stem.

6. In combination, a fluid duct having a valve seat and an aperturel inits wall in front of the seat, a valve stem extending through theaperture and having a packing shoulder, a valve adjustably mounted onthe stem, a

acking carried by the stem and cooperating with the shoulder to closethe aperture in the wall of the duct, and a sleeve inclosing the valvestem and reacting between the valve and the packing.

WILLIAM C. VVI-IITCOMB.

Witnesses:

CHARLES B. GILLsoN, E. M. KLATCHER.

